Electric thermostat and push-button



(No Model.)

O. F. WOODWABD. ELECTRIC THERMOSTAT AND PUSH BUTTON.

Patented Dec. 31, 1895.

UNITED STATES ORATOR F. V OODVY'ARD,

PATENT @rrrcn.

OF LE ROY, NEIV YORK.

ELECTRIC THERMOSTAT AND PUSH-BUTTON.

SPECIFICATION forming part of Letters Patent No. 552,166, dated December 31, 1895.

Application filed December 29, 1893. Serial No. 495,048. (No model.)

To aZZ 2072 0710 it nuoy concern.-

Be it known that I, ORATOR F. V0 ODWARD, of Le Roy, in the county of Genesee and State of New York, have invented a certain new and useful Improvement in Electric Thermostats and Push-Buttons; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the drawings accompanying this application.

The design of my improvement is to combine in a single instrument an electric pushbutton and thermostat, and in some instances a call-bell; and the invention'consists in the construction and arrangement hereinafter described, and embraced in the claims.

In the drawings, Figure 1 is a face view of the device. Fig. 2 is a cross-section in line a; 00 of Figs. 1 and 3. Fig. 3 is a section in line y y of Fig. 2. Fig. 4 is a cross-section of the expansible ring.

A indicates the base, which consists of. a disk of some insulating material.

B is a perforated case which admits air to the interior. This case may or may not be used, as desired.

C is an expansible ring, made up of two separate strips a 1) attached together and capable of diiterent degrees of expansibility under heat. hen subjected to heat the tendency of the ring is to expand or straighten. One end of the ring is attached at c to the insulated base, while the opposite end is free to move out and in.

D is an electrode, consisting of a plate socured to the base by a screw (Z resting in a slot f of the plate, whereby the latter can be adjusted forward and back relatively to a pivoted bar E, which forms a conductor. By means of this adjustment the apparatus can be made to sound an alarm at any predetermined degree of heat. The bar E is pivoted at g to a conducting-plate 7L, and is connected with the free end of the expansible ring 0 by a link 7c, whereby, when the ring is expanded, the end of the conducting-bar E is brought in contact with the electrode D, thus completing the circuit. The conducting-plate it is connected with a screw an, attached to the base, and to the screw is attached the pushbutton, as will presently be described.

1 and 2 are two conducting-wires, one connected with the screw on and provided with a battery or other source of electricity, the other connected with the electrode D by a rivet .2 and extending to an office or other place and connected with a bell L forming an annunciator, whereby an alarm may be sounded.

In case of fire at the locality where the instrument is placed the increase of heat expands the ring 0, turns the bar E till it comes in contact with the electrode D, and thereby forms a circuit through wire 2 to the annunciator L.

G is a hollow stem attached to the screw "in and extending upward. II is a push-button provided with a plug n, which plays up and down in the stem, being pressed upward by a spring 1.). The shank of the push-button is provided with an arm 1' that passes out through a slot 5 of the stem, its lower end resting over the electrode D, but removed therefrom. \Vhen the button is pushed down the end of the arm comes in contact with the electrode, thereby completing the circuit through wire 2 and sounding the call at annunciato r L.

By combining the thermostat and push-button in one instrument, as described, it is in compact and convenient form and serves the purpose of two separate instruments. It is of special use in those locations where calls are necessary and where it is desired to guard against tirefor instance, in hotels.

In some cases a call-bell K may be used, attached to the instrument for the purpose of signaling from an office or other point to the location where the instrument is used. In such case it is attached so as to overcap the instrument, and is provided with ahammert and electromagnet o, as usual in this class of instruments, and is provided with separate electrical connections and a. It is of service in hotels and other places, and serves the threefold purpose of a thermostat, an annunciator and a call-bell. A

In case the bell K is not used itis replaced by a cap of any suitable kind which covers the instrument and supports the push-button.

By use of the bar E, pivoted near the end operated by the expansible ring, the opposite or free end has a long movement which renders it very sensitive to the action of heat and renders it capable of making a quick connection.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an electric thermostat, the combination of a base with an expansible strip, a movable conducting bar, and an electrode, all supported on the said base in a plane parallel thereto, the said expansible strip and conducting bar being parallel to each other and connected at the free end of the former and the said electrode being arranged opposite the other end of the said bar for closing the circuit when the said strip expands substantially as set forth.

2. In an electric thermostat the combination of an expansible strip, with a movable conducting bar connected thereto and operated thereby, an electrode arranged for con tact with the said bar when the latter is thus operated, means for adjusting the said electrode toward or from the said bar at will and a base on which the said bar and strip are supported in positions parallel to each other and in a plane parallel to the said base substan tially as set forth.

3. The combination of the eXpansible ring C, the pivoted conducting bar E, the link 7o connecting the free end of the expansible ring with the conducting bar, the adjustable electrode D, the electrical connections 1, 2, connected respectively with the conducting bar and electrode, the tube G, electrically connected with the bar E, and the push button H resting in said tube and provided with arm 0", as shown and described and for the purpose specified.

4:. The combination of the base A and tube B extending therefrom of a bell K attached to the tube and surmounting the base, the electro-magnet 'u for operating the hammer of the bell, the push button H movable up and down in the said tube and provided with an arm 0, an electrode arranged for contact with the said arm and electrical connections making circuit through the said magnet when the said knob is depressed substantially as set forth.

In witness whereof I have here unto signed my name in the presence of two subscribing witnesses.

ORATOR F. \VOODXVARD.

lVitnesses:

CoRA T. WooDwAnD, JOHN R. OLMSTED. 

